Added F (probing speed) and T (travel speed) parameters to M558 command
Removed M210 command because home feed rates are defined in the homing
files
Increased UART interrupt priority to avoid dropping characters sent by
PanelDue
Bug fix: M558 P3 did not leave the Z probe control pin high
Bug fix: in version 1.09j only, the move following a G92 E0 command was
sometimes executed from an incorrect start point
Fixed bugs with reads/writes from/to the SD card that spanned one or
more whole sectors
Updated to latest Atmel HSMCI driver
